<!DOCTYPE html>
<html>

<head>
  <title>Webpack Vue Demo</title>
  <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>

<body>
  <div id="app">
    <button id="btn1">懒加载</button>
    <div class="a">有使用样式</div>
    <div>没有使用样式</div>
  </div>
</body>

</html>